EP0136696A2 - Stereo-Abbildungssystem mit Flüssigkristallzelle - Google Patents

Stereo-Abbildungssystem mit Flüssigkristallzelle Download PDF

Info

Publication number
EP0136696A2
EP0136696A2 EP84111766A EP84111766A EP0136696A2 EP 0136696 A2 EP0136696 A2 EP 0136696A2 EP 84111766 A EP84111766 A EP 84111766A EP 84111766 A EP84111766 A EP 84111766A EP 0136696 A2 EP0136696 A2 EP 0136696A2
Authority
EP
European Patent Office
Prior art keywords
liquid crystal
crystal cell
imaging system
alignment
dimensional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84111766A
Other languages
English (en)
French (fr)
Other versions
EP0136696A3 (de
Inventor
Howard G. Rogers
Kuang Chou Chang
Kenneth S. Norland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polaroid Corp
Original Assignee
Polaroid Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polaroid Corp filed Critical Polaroid Corp
Publication of EP0136696A2 publication Critical patent/EP0136696A2/de
Publication of EP0136696A3 publication Critical patent/EP0136696A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/12—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/239—Image signal generators using stereoscopic image cameras using two 2D image sensors having a relative position equal to or related to the interocular distance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing

Definitions

  • the present invention relates to three dimensional or stereoscopic imaging systems and, more particularly, to such systems in which a liquid crystal cell having a switchable transmission plane is utilized with an image-producing screen to provide the viewer with the perception of a stereo or three dimensional image.
  • a polarizer generally overlies the image-producing surface and polarizes the successive right and left perspective images along a first, fixed transmission plane.
  • a switchable liquid crystal cell overlies the polarizer and is electrically operable to rotate its transmission plane between the first, fixed alignment and a second, orthogonal alignment in synchronism with the transmission of the right and left perspective image frames.
  • the liquid crystal cell is typically fabricated with a liquid crystal material of the twisted nematic type that is selectively excitable by the application of a voltage potential to rotate the transmission plane between the first, fixed alignment and the second, orthogonal alignment in synchronism with the transmission of the right and left perspective images.
  • the switching time of the liquid crystal cell, both the rise time and decay time, for rotating the transmission plane between the two orthogonal alignments can be sufficiently high to adversely affect the ability of the system to provide the desired stereoscopic perception.
  • the standard TV signal contains sufficient information to generate 30 image frames of 525 lines each per second with approximately 33 milliseconds allotted to each frame.
  • Each frame comprises two interlaced fields (or half frames) with each field or half frame allotted 17 milliseconds or so.
  • the transistion time for the liquid crystal material to switch between its two orthogonal transmission alignments has been on the order of 20 milliseconds or longer. As can be appreciated, such slow switching times can mitigate against the production of the desired stereoscopic perception on the part of the viewer.
  • the liquid crystal cell be divided into upper and lower halves so that the upper half can be switched during or shortly after the scanning of the upper portion of the image frame and the lower half switched during or shortly after the scanning of the lower portion of the frame to accommodate the acknowledged long switching time of the prior liquid crystal cells in this application.
  • the suggested upper and lower division of the liquid crystal cell has limited efficacy where the displayed image is generated by an interlaced raster pattern, as is the case in many television transmission schemes.
  • the present invention provides for a stereoscopic or three dimensional imaging system in which an imaging device, such as a television receiver or a computer-driven video terminal, alternately produces right and left perspective images of a subject.
  • an imaging device such as a television receiver or a computer-driven video terminal
  • a polarizer overlying the imaging surface polarizes the right and left perspective images along a first, fixed transmission plane.
  • a fast-switching liquid crystal cell overlying the polarizer alternately rotates the transmission plane of the polarized images from the first, fixed transmission alignment to a second, orthogonal transmission alignment in synchronism with the production of the right and left perspective images.
  • a viewer wears spectacles in which a first eyepiece is defined by an analyzer material having a transmission plane aligned substantially parallel to the first transmission plane, and a second eyepiece defined by an analyzer material having its transmission plane aligned orthogonal to the first transmission plane.
  • the viewer accordingly perceives the alternate left and right perspective images as a single image having the desired three dimensional effect.
  • the liquid crystal cell is of the twisted nematic type and includes a liquid crystal material doped with a chiral material.
  • the amount of chiral material utilized in the liquid crystal cell will be an amount effective to reduce the switching response time of the cell to a value substantially less than the time allotted for each of the half frames.
  • each field or half frame will be allotted about 17 milliseconds and, accordingly, the chiral additive will be employed in the liquid crystal cell in an amount sufficient to provide a switching response time substantially less than about 17 milliseconds.
  • the chiral material will be employed in the liquid crystal cell in an amount sufficient to provide a switching response time substantially less than about 11.1 milliseconds.
  • the combination of the twisted nematic liquid material with the chiral material has been found to provide a liquid crystal cell having rapid switching speeds at room temperature that permit the realization of desired stereoscopic perception. It has been found, for example, that a liquid crystal cell having a switching response time of 3 milliseconds can be provided by utilization of a chiral material in a liquid crystal cell thereof.
  • the liquid crystal cell possesses an acceptable contrast ratio (at least 10:1) and both the switching response time and the contrast ratio are cell thickness independent in the range of 10 to 50 microns. This allows the use of inexpensive cell substrate materials for making large area liquid crystal cells.
  • the liquid crystal material will be doped with a minor amount of the chiral additive that will vary with the nature of the particular nematic liquid crystal material, the nature of the chiral material, and the particular system utilized and the requirements thereof. Good results can be obtained, for example, using from about 1% to about 1.4% by weight of the chiral material. A preferred amount is about 1.2% by weight.
  • FIGS. 1 and 2 A stereoscopic or three dimensional imaging system in accordance with the present invention is shown in schematic, block diagram form in FIGS. 1 and 2, with FI G . 1 showing an exemplary television transmission system, generally designated by the reference character 10, and FIG. 2 illustrating a combined television receiver and viewing system, generally designated by the reference character 100.
  • the transmission system 10 transmits, in a successive sequential manner, right and left perspective images of the subject S while the receiving and viewing system 100 presents the successive right and left images to a viewer (not shown) wearing viewing spectacles G described more fully below.
  • the transmission system includes a right perspective video camera C R and a left perspective video camera C L that are separated from one another by a selected separation distance and which provide right perspective and left perspective video signals, V R and V L , to a switching device such as a multiplexer 12 which, in turn, provides the multiplexed video output to a video transmitter 14, of conventional design, for transmission through an antenna 16.
  • a clock circuit 18 provides an output pulse train to both the multiplexer 12 and to a control signal section of the transmitter 14.
  • the clock 18 provides a bi-state signal which, in one state, causes the multiplexer 12 to switch one of the two video input signals to the multiplexer output and, in the other state, to switch the other of the two video input signals to the multiplexer output. As shown in FIG.
  • the binary high value is assigned to switching the left perspective signal V L to the output of the multiplexer 12 and the binary low value is assigned to switching the right perspective video signal V R to the output of the multiplexer.
  • the duration of the pulses provided by the clock 18 and their spacing is sufficient so that a complete video half frame pattern can be transmitted during the time the multiplexer 12 is in each of its two switching states.
  • the output of the multiplexer 12, which represents a sequential succession of right perspective and left perspective video signals v R and V L is presented to the video transmitter portion of the transmitter 14 which transmits the signal in the conventional manner through the antenna 16.
  • the frame-synchronizing timing pulses provided by the clock 18 can be superposed onto the video signal or transmitted on a separate carrier as is known in the art.
  • the video signals transmitted are assumed to contain a full complement of image-forming signals for black and white and/or color imaging and, additionally, an audio carrier signal.
  • the transmission system shown in FIG. 1 is an exemplary system for transmitting a succession of alternate right and left perspective images of the subject S.
  • Other systems are suitable for such purposes including systems utilizing a single camera with right and left perspective stereo-optic systems and rotatable mirrors or prisms that successfully direct the image output of the right and left perspective optical systems into the camera for subsequent transmission.
  • the combined receiver and viewing system 100 of FIG. 2 includes a receiver 102 that receives the transmitted signal through an antenna 104 and provides a video output to a cathode-ray tube CRT which displays the alternate right and left perspective images on its display surface.
  • a cathode-ray tube CRT which displays the alternate right and left perspective images on its display surface.
  • Other equallly suitable image displaying devices can be used, such as rear-screen projection systems, solid-state panel-type displays, and the like.
  • a polarizer P and a liquid crystal cell LCC are provided in an overlying relationship with the CRT display surface.
  • a switching device such as a synchronizer 106 is connected to the liquid crystal cell LCC to control the alignment of its transmission plane as described more fully below.
  • the receiver 100 receives the succession of sequentially transmitted right and left perspective video signals and the associated frame timing signal transmitted by the transmitter 10 in a conventional manner and provides the successive right and left perspective video imaging signals V R and V L to the cathode-ray tube CRT which, in turn, displays the successive right and left perspective images on its screen, as is conventional in the art.
  • the fixed polarizer P has a surface area at least coextensive with that of the screen of the cathode-ray tube CRT and overlies the cathode-ray tube to initially polarize the successively displayed right and left perspective images along a preferred transmission plane, such as the substantially vertical transmission alignment shown in FIG. 2.
  • the switchable liquid crystal cell LCC has an area at least coextensive with that of the polarizer P and the screen of the cathode-ray tube CRT and is positioned in front of and in an overlying relationship with the polarizer P.
  • the switchable liquid crystal cell L CC includes a controllable liquid crystal of the twisted nematic type and has a transmission plane that can be selectively rotated or switched between a first alignment substantially parallel to the transmission plane of the polarizer P and a second alignment which is orthogonal to the first transmission plane.
  • the switchable liquid crystal cell LCC is controlled by the synchronizer 106 which receives the frame-synchronized control pulses from the receiver 102 and alternately switches power from a power supply PS to the switchable liquid crystal cell LCC.
  • the system of FIGS. 1 and 2 provides a three-dimensional television display of the transmitted signals as provided through the antenna 104 of the receiver 102.
  • a computer C (phantom line illustration in FIG. 2) provides computer-generated video signals through a separate input, for example, for display by a cathode-ray tube.
  • the computer generates a succession of right perspective and left perspective images of the subject matter to be displayed, which images are displayed in a manner similar to that of the above-described television system.
  • the cathode-ray tube whether driven by television type signals or computer-generated videographic signals, in combination with the polarizer P, the liquid crystal cell LCC, and the switching synchronizer 106 can be used to provide three-dimensional image displays.
  • FIG. 3A represents the bi-state frame-synchronized timing pulses that are generated by the clock 18 in the transmitter 10, transmitted to the receiver 102, and utilized by the synchronizer 106 to switch the switchable liquid crystal cell LCC. Where a computer-generated video signal is utilized, the timing pulses can be generated by the computer.
  • the binary high value has been arbitrarily assigned to the left perspective video signal V L and the binary low value to the right perspective video signal V R .
  • the timing pulses are provided from the receiver 102 to the synchronizer 106 which, in turn, alternately applies supply power, such as a 500Hz, 30 volts peak-to-peak alternating current waveform, as shown in FIG. 3B, to the switchable liquid crystal polarizer P2.
  • supply power such as a 500Hz, 30 volts peak-to-peak alternating current waveform, as shown in FIG. 3B
  • the transmission plane of the liquid crystal cell LCC rotates between the first alignment parallel to the transmission plane of the first polarizer P and an orthogonal alignment represented by the dotted line arrow in FIG. 2. Because of the recognized discrete rise and decay transition times required to effect transmission plane rotation after the application and removal of the switching voltage ( F IG. 3B), the leading and trailing edges of the pulses of FIG. 3 C are inclined.
  • the liquid crystal cell L C C is fabricated so that its switching time, in contrast to prior liquid crystal cells, is substantially less to provide relatively quick transition times that are an acceptably small fraction of the total half frame display time.
  • images of the first perspective such as the left perspective
  • images of the other perspective that is, the right perspective
  • images of the other perspective that is, the right perspective
  • the spectacles or visors G worn by the viewer have eyepieces formed from analyzer materials in which the transmission planes are orthogonal to one another so that the viewer, through one eye, sees left perspective images and, through the other eye, sees right perspective images with the result that the viewer perceives a composite three dimensional image.
  • the liquid crystal cell LCC as shown in the partial isometric view of FIG. 4, includes first and second transparent plates 110 and 112, fabricated, for example, from glass, that are maintained in a spaced, substantially parallel relationship by an edge seal/spacer 114 of uniform thickness that is bonded, cemented, or otherwise secured to the plates 110 and 112.
  • the plates 110 and 112 are spaced from one another by a dimension "d", generally between 10 and 50 microns.
  • the inner, facing surfaces of the plates 110 and 112 are provided with a substantially transparent conductive coating, such as indium-tin oxide alloy (ITO), to define a field- producing electrode pair El and E2.
  • a substantially transparent conductive coating such as indium-tin oxide alloy (ITO)
  • ITO indium-tin oxide alloy
  • the glass plate with such coating can be purchased commercially from suppliers such as Optical Coating Laboratory, Inc. in Santa Rosa, CA 95402.
  • Conductive coatings deposited on soda lime float and sheet glass, such as LC4004 from the Optical Coating Laboratory, can be used.
  • a liquid crystal material of the twisted nematic type and a switching speed-enhancing additive fills the space between the plates 110 and 112 to define a liquid crystal cell.
  • the inner facing surfaces of the plates are coated, as is known in the art, with a chemical alignment film having surface characteristics that are effective to control the alignment of the nematic crystal material adjacent to the plates.
  • the chemical alignment film is deposited on the inner facing surfaces of the plates 110 and 112 in such a way that the nematic liquid crystal material, in the absence of an electrostatic director field, is twisted by 90° so that any light polarized along a first transmission plane transmitted through the liquid crystal cell LCC will have its transmission plane rotated (that is, twisted) by 90°.
  • excitation energy such as the alternating voltage from the supply PS
  • an electrostatic field is developed between the electrodes and has the effect of counteracting the aligning force provided by the chemical alignment film so that the liquid crystal molecules rotate perpendicular to the plates and thereby not rotate the transmission plane of the liquid crystal cell.
  • the liquid crystal material that fills the two plates is a mixture of a nematic liquid crystal material and a chiral material that is added to the nematic material. It has been found that the combination of the nematic liquid crystal material, such as liquid crystal materials designated as E7 and E18 and available from E.M. Chemicals, 5 Skyline Drive, Hawthorne, New York 10532, the formula of which is presented in FIG. 5A, and doped, for example, with 1.2% by weight of a chiral material, such as CB15, also from E.M. Chemicals, the formula of which is presented in FIG.
  • a chiral material such as CB15
  • liquid crystal switchable cell having rise and decay times of less than one millisecond (lms.) and three milliseconds (3ms.), respectively.
  • this relatively fast-switching feature is independent of cell thickness between a thickness range of 10 and 50 microns at room temperature.
  • the indicated transition times represent an acceptably small fraction of the total half frame display time and permits the construction of an efficient three dimensional or stereoscopic television or computer graphics system.
  • the liquid crystal cell has an acceptable contrast ratio (at least 10:1).
  • the present invention provides for a three dimensional or stereo imaging system in which alternate perspective image frames are displayed on an image screen with the displayed images polarized in a first direction and then presented to a switchable liquid crystal cell which is operated to rotate the plane of polarization between two different alignments in synchronism with the display of the alternate perspective image frames to provide the desired three dimensional visual effect.
  • the switchable cell is defined by a liquid crystal cell that utilizes a liquid crystal material of the twisted nematic type advantageously doped with a chiral material to provide a liquid crystal cell having switching times that are acceptably low relative to the image frame duration to provide a high level of visual three dimensional perception and to provide a large area liquid crystal cell that can be constructed using inexpensive glass materials having no special requirements as to flatness.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
EP84111766A 1983-10-03 1984-10-03 Stereo-Abbildungssystem mit Flüssigkristallzelle Withdrawn EP0136696A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53852383A 1983-10-03 1983-10-03
US538523 1983-10-03

Publications (2)

Publication Number Publication Date
EP0136696A2 true EP0136696A2 (de) 1985-04-10
EP0136696A3 EP0136696A3 (de) 1987-01-28

Family

ID=24147249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111766A Withdrawn EP0136696A3 (de) 1983-10-03 1984-10-03 Stereo-Abbildungssystem mit Flüssigkristallzelle

Country Status (2)

Country Link
EP (1) EP0136696A3 (de)
JP (1) JPS60102086A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264927A2 (de) * 1986-10-23 1988-04-27 Nokia (Deutschland) GmbH Bildwiedergabeanordnung mit einer Bildröhre und Verfahren zur Herstellung
WO1991014201A1 (de) * 1990-03-07 1991-09-19 MERCK Patent Gesellschaft mit beschränkter Haftung Elektrooptisches flüssigkristallsystem
GB2248745A (en) * 1990-08-14 1992-04-15 Samsung Electronics Co Ltd Picture signal superposing circuit
GB2269290A (en) * 1992-07-18 1994-02-02 Microsurgical Equipment Ltd Three dimensional polarised viewing systems
US5978062A (en) * 1997-01-31 1999-11-02 National Science Council Method of fabricating closed cavity liquid crystal display having a plurality of cavities extending completely through insulating layer
CN102200647A (zh) * 2010-03-23 2011-09-28 北京爱国者信息技术有限公司 三维显示系统及三维显示设备
CN102200646A (zh) * 2010-03-23 2011-09-28 北京爱国者信息技术有限公司 一种三维显示器及其系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62191824A (ja) * 1986-02-17 1987-08-22 Sharp Corp 擬似立体表示システム
JPS63290485A (ja) * 1987-05-22 1988-11-28 Sony Corp 立体映像表示装置
JPH01317092A (ja) * 1988-06-17 1989-12-21 Stanley Electric Co Ltd 立体映像の表示方法
JPH06500445A (ja) * 1991-06-12 1994-01-13 リー、スン ３次元イメージの記録および再生

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448520A (en) * 1974-10-25 1976-09-08 Standard Telephones Cables Ltd Stereoscopic display device
FR2322914A2 (fr) * 1975-09-03 1977-04-01 United Kingdom Government Derives optiquement actifs du cyano-biphenyle et du cyano-terphenyle, et leurs applications dans des matieres et dispositifs a cristaux liquides
US4120567A (en) * 1977-02-11 1978-10-17 Rca Corporation Electro-optic device
US4143947A (en) * 1976-06-21 1979-03-13 General Electric Company Method for improving the response time of a display device utilizing a twisted nematic liquid crystal composition
JPS5782818A (en) * 1980-11-11 1982-05-24 Seiko Epson Corp Liquid crystal display body

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448520A (en) * 1974-10-25 1976-09-08 Standard Telephones Cables Ltd Stereoscopic display device
FR2322914A2 (fr) * 1975-09-03 1977-04-01 United Kingdom Government Derives optiquement actifs du cyano-biphenyle et du cyano-terphenyle, et leurs applications dans des matieres et dispositifs a cristaux liquides
US4143947A (en) * 1976-06-21 1979-03-13 General Electric Company Method for improving the response time of a display device utilizing a twisted nematic liquid crystal composition
US4120567A (en) * 1977-02-11 1978-10-17 Rca Corporation Electro-optic device
JPS5782818A (en) * 1980-11-11 1982-05-24 Seiko Epson Corp Liquid crystal display body

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS INTERNATIONAL, vol. 56, no. 10, May 1983, pages 52,54, New York, US; "Liquid-crystal displays" *
IEEE TRANSACTIONS ON ELECTRON DEVICES, vol. 28, no. 6, June 1981, pages 723-725, IEEE, New York, US; R.L. HUBBARD et al.: "Optical-bounce removal and turnoff-time reduction in twisted-nematic displays" *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 166 (P-138)[1044], 31st August 1982; & JP-A-57 82 818 (SUWA SEIKOSHA K.K.) 24-05-1982 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264927A2 (de) * 1986-10-23 1988-04-27 Nokia (Deutschland) GmbH Bildwiedergabeanordnung mit einer Bildröhre und Verfahren zur Herstellung
EP0264927A3 (en) * 1986-10-23 1989-10-18 Nokia Graetz Gesellschaft Mit Beschrankter Haftung Image-displaying device with a display tube, and method of manufacturing it
WO1991014201A1 (de) * 1990-03-07 1991-09-19 MERCK Patent Gesellschaft mit beschränkter Haftung Elektrooptisches flüssigkristallsystem
GB2248745A (en) * 1990-08-14 1992-04-15 Samsung Electronics Co Ltd Picture signal superposing circuit
GB2248745B (en) * 1990-08-14 1994-08-03 Samsung Electronics Co Ltd Picture superposing circuit
GB2269290A (en) * 1992-07-18 1994-02-02 Microsurgical Equipment Ltd Three dimensional polarised viewing systems
US5978062A (en) * 1997-01-31 1999-11-02 National Science Council Method of fabricating closed cavity liquid crystal display having a plurality of cavities extending completely through insulating layer
CN102200647A (zh) * 2010-03-23 2011-09-28 北京爱国者信息技术有限公司 三维显示系统及三维显示设备
CN102200646A (zh) * 2010-03-23 2011-09-28 北京爱国者信息技术有限公司 一种三维显示器及其系统

Also Published As

Publication number Publication date
JPS60102086A (ja) 1985-06-06
EP0136696A3 (de) 1987-01-28

Similar Documents

Publication Publication Date Title
EP0233636B1 (de) Scheinbar stereographisches Wiedergabesystem
US4641178A (en) Method and apparatus for producing stereoscopic images
US4792850A (en) Method and system employing a push-pull liquid crystal modulator
US4698668A (en) Apparatus for influencing the presentation of visual information
US20070153380A1 (en) High-resolution field sequential autostereoscopic display
JP2003177356A (ja) ２ｄ／３ｄ兼用ディスプレイ
US20090046214A1 (en) 2d/3d convertible display apparatus and method of driving the same
JPH10239641A (ja) 偏光眼鏡および画像表示システム
EP2631702A2 (de) Stereoskopisches anzeigesystem, für dieses system verwendete brille und anzeigeverfahren dafür
EP0136696A2 (de) Stereo-Abbildungssystem mit Flüssigkristallzelle
JP2882393B2 (ja) 立体表示装置
JPH11296135A (ja) 画像表示装置
TW201017221A (en) Stereoscopic display device and stereoscopic image displaying method
CN108227228A (zh) 3d眼镜镜片及其驱动方法、3d眼镜及其驱动方法
CN102088615A (zh) 基于光控时分法的数字立体显示系统及显示方法
JPH075325A (ja) 立体表示偏光フィルムおよび立体表示装置
JPH1138361A (ja) 立体表示装置
JPS62191820A (ja) 擬似立体表示システム
JPH05232403A (ja) 表示装置
EP0136085B1 (de) Vorrichtung zum Beeinflussen der Darstellung sichtbarer Information
JPH04250439A (ja) 立体表示用スクリーンと立体表示装置及びその駆動方法
JPS6271394A (ja) 立体映像表示装置
JPH05257083A (ja) 立体表示装置
Harris et al. Frame-sequential stereoscopic system for use in television and computer graphics
JPS62223719A (ja) 立体視装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870729

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROGERS, HOWARD G.

Inventor name: CHANG, KUANG CHOU

Inventor name: NORLAND, KENNETH S.